EP3528226B1 - Appareil de système destiné à fonctionner dans un réseau sans fil - Google Patents

Appareil de système destiné à fonctionner dans un réseau sans fil Download PDF

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Publication number
EP3528226B1
EP3528226B1 EP19157911.9A EP19157911A EP3528226B1 EP 3528226 B1 EP3528226 B1 EP 3528226B1 EP 19157911 A EP19157911 A EP 19157911A EP 3528226 B1 EP3528226 B1 EP 3528226B1
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EP
European Patent Office
Prior art keywords
system device
wireless interface
intermediate station
data
transmit
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EP19157911.9A
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German (de)
English (en)
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EP3528226A1 (fr
Inventor
Peter Prodell
Markus Rhein
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Siteco GmbH
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Siteco GmbH
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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0426—Programming the control sequence
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
    • G08G1/0108—Measuring and analyzing of parameters relative to traffic conditions based on the source of data
    • G08G1/0116—Measuring and analyzing of parameters relative to traffic conditions based on the source of data from roadside infrastructure, e.g. beacons
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0428—Safety, monitoring
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/26—Pc applications
    • G05B2219/2642—Domotique, domestic, home control, automation, smart house
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C2201/00—Transmission systems of control signals via wireless link
    • G08C2201/60—Security, fault tolerance
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
    • G08G1/0125—Traffic data processing
    • G08G1/0133—Traffic data processing for classifying traffic situation
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/052—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/052—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed
    • G08G1/054—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed photographing overspeeding vehicles
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/14—Traffic control systems for road vehicles indicating individual free spaces in parking areas

Definitions

  • the present invention relates to a system device that is set up to be operated in a wireless network made up of a number of such system devices and possibly an intermediate station.
  • the system devices are each set up to operate a lighting device, building technology, signaling technology and/or sensor technology, with the system devices having a wireless interface.
  • Networks made up of wirelessly connected system devices of the type mentioned at the outset are known in the prior art, for example through the use of the Bluetooth protocol or as WiFi, ie in general WLANs that use the specification of the wireless protocol family from 802.11.
  • Bluetooth protocol or as WiFi
  • WiFi wireless protocol family
  • 802.11 Wi-Fi Protected Access
  • a protocol specification for wireless networks with low data volume is known, for example, in the form of ZigBee.
  • ZigBee protocol has significant security gaps.
  • encryption of the exchanged data is provided, this key is defined, for example, for all ZigBee devices by a master key that all certified manufacturers of the devices use. There is therefore a risk that the master key cannot be kept secret, creating a potential security gap.
  • lighting technology can certainly affect safety-relevant areas.
  • signaling systems such as traffic lights for controlling the flow of traffic, or sensor units, such as motion detectors used as alarms in building surveillance, directly affect security-relevant areas.
  • Lighting technology indoors and outdoors should also be protected against unauthorized access, since the failure of a lighting device, e.g. outdoors for a traffic area with high traffic density or indoors to illuminate escape routes, is definitely relevant to safety.
  • CA2 852 445 A1 and U.S. 2008/054821 A1 disclose a controller according to the preamble of claim 1.
  • U.S. 2017/156189 A1 discloses a controller for a lighting system.
  • a controller provides an operational protocol that allows the controller to be programmed only through a direct physical connection to the controller.
  • the object of the present invention is to provide a suitable system device that can be operated in a network and to provide an intermediate station for controlling the system devices that can communicate wirelessly in the simplest possible way while still ensuring an adequate security standard.
  • the object is achieved by a system device according to claim 1 and a system with an intermediate station and a system device according to claim 14.
  • a special feature of the system devices according to the invention is that they are operated autonomously according to a predetermined program which is stored in the system device and cannot be changed by a wireless interface either. Only a change of program from a predetermined number of multiple programs that are stored locally in the system device, via the wireless interface.
  • the program can include a time control of the relevant execution unit in the system device. If necessary, the time control can be brought into another mode by a program change, for example in order to switch from summer to winter operation or the like.
  • no new programs can be uploaded wirelessly to the system device or existing programs can be changed via the wireless interface.
  • no great damage can be caused.
  • the only unauthorized change a hacker could make is simply to select one of the preinstalled programs.
  • the system device continues to operate autonomously in the relevant program, so that potential damage is minimal.
  • the wireless interface is set up to only receive instructions within defined time windows.
  • the wireless interface may receive data only once a day, a week, a month, or a year to change the program for the autonomous operation of the system device in question.
  • An unauthorized attack on the device is prevented by the fact that unauthorized access can no longer take place spontaneously. Since the time windows are also not recognizable for a potential attacker, an unauthorized program change in the system device can also be effectively prevented.
  • the wireless interface for receiving instructions is controlled via the program of the system device and it it can also be provided that with a change in the program of the system device, there is also a change in the time interval until the next time the wireless interface is switched on to receive instructions.
  • a confirmation of the running program during the wireless interface on-period may be equivalent to a program change. It can also be provided that only one program change can be carried out during the reception period of the wireless interface. Provision can also be made for the wireless interface to be switched off for receiving instructions after the program change has been received.
  • the wireless interface is further configured to send data related to the operational status of the system device. This allows the system device to be monitored over the wireless network. Furthermore, according to a preferred embodiment, it is also provided that the wireless interface is set up for sending data and the system device also has a sensor unit, which is set up to send data recorded with the sensor unit via the wireless interface. This embodiment is suitable for system devices that are set up for data acquisition with a sensor unit, for example to detect light, images, movements, in particular traffic density or parking space availability, vehicle speeds, location and direction of road users or environmental conditions, in particular temperature, humidity and pressure and forwarded to a central office.
  • the system device has a signal unit in order to emit visual, optical or acoustic signals.
  • a traffic control system can emit visual or optical signals.
  • a system device that is equipped with a motion detector can, for example, emit an acoustic alarm signal.
  • these functions are controlled autonomously by the program present in the system device, so that an attack on the functioning of the signal unit cannot cause any fundamental change in the functionality of the system device.
  • the signal unit can also be provided for displaying a functional status of a component of the system device. This makes it easy to remotely monitor the system device via the wireless interface.
  • the wireless interface can communicate via a WiFi protocol or a Bluetooth protocol. Even if an attacker manages to hack the keys used in these protocols, not much damage can be done due to the functionality of the system device to only work autonomously according to a given program.
  • the wireless interface can also be set up to perform an identification of the system device, in particular in connection with a functional state of the system device or with data measured by a sensor unit of the system device. This allows the system device that is sending the data to be identified from the received signal.
  • the selection of the programs can have different time periods and/or types of data acquisition, include different lighting levels depending on time or measured data, include different encryption of the transmitted data and/or different signals or signal combinations on an output unit, e.g. the wireless interface, output.
  • an output unit e.g. the wireless interface, output.
  • the selection of the possible programs can be designed in such a way that even in the event of an unauthorized change of the program, the basic functionality of the system device cannot be switched off.
  • the system device can have an integrated clock, e.g. for controlling defined time windows for data reception.
  • a device for determining the geographic location e.g. GPS, can also be provided in the system device. The geographic location can be independently recorded by the system device after installation and e.g. sent wirelessly together with an identification of the system device. This simplifies the installation or initialization of the system device in the network.
  • the wireless interface is set up for this is to send data wirelessly to a wired central communication device and/or to send it to an intermediate station which is connected to a central communication device by wire or wirelessly.
  • the use of a transfer station has the advantage that the transmission path of the wireless interface of the system device only needs to be set up to enable wireless communication between the system device and the transfer station over a short distance. For example, a local network such as WLAN can suffice for this.
  • the further communication from the intermediate point to a central communication unit can then take place by cable or by wireless communication using another standard provided for longer connections.
  • the system device is configured to turn off the wireless interface for a predetermined time. This not only serves to save energy but also has the advantage that unauthorized access to the system device is no longer possible without knowing the specified times at which the system device is switched on.
  • a system device By turning on the wireless interface, the program executing the execution can be changed. For example, a system device can go into an idle state for a longer period of time and only when the wireless interface is switched on again, one of the specified programs is executed. For example, a system device, which has an outdoor lighting device, in daylight completely, ie including the wireless interface, are switched off and, when switched on again, initially enter an operating state intended for twilight before it switches over to night-time operation.
  • the invention further provides a system with an intermediate station and with at least one system device as described above.
  • the transfer station has a wireless interface configured to send instructions to change the program that the system device is executing to another program stored in the system device.
  • the intermediate station can therefore be provided at a shorter spatial distance from the system device than a central communication device with which the intermediate station communicates via a cable or via another wireless standard.
  • the wireless interface of the system devices or the intermediate station therefore only has to be set up for data transmission over a shorter distance, e.g. up to 300 m or up to 5 km.
  • the wireless interface of the transfer station is also set up to transmit a switch-on command to a system device, with the switch-on command in particular also causing a program change in the system device.
  • the program change can be effected in the system device via the intermediate station, with the program change, however, being restricted to the selection of the programs stored in the system device.
  • the intermediary station also has a wired interface which is set up to transmit data relating to system devices.
  • the functional status of the system device which is received wirelessly at the intermediate station, can be sent to the control center using the wired interface.
  • a malfunction or a defect in a system device can also be passed on wirelessly (possibly also repeatedly) without querying the intermediate station.
  • the data traffic between the intermediate station and the control center as well as between the system device and the intermediate station is preferably secured with a cryptographic method, in particular a symmetric or asymmetric encryption algorithm. This also serves to ensure the overall security of the network from each individual system device via the intermediate station to the control center.
  • the data sent by the transfer station contains a unique identification of the transfer station. Therefore, in a network with multiple transfer stations, each communicating with a group of system devices, the identification of a system device may consist of a system device identification number, which is unique only within the group of system devices connected to a transfer station, and the identification number of the Assemble intermediate station. This enables a relatively simple unique addressing of each individual system device within a network of a A large number of system devices that are controlled in groups via one of several intermediate stations.
  • the intermediary station is also set up to query a defect in a system device or another functional status of the system device via the wireless interface and to send it on to the control center. This allows the control center to easily monitor the functional status of all system devices.
  • figure 1 shows a schematic representation of a network of three system devices, an intermediate station and a central station.
  • a network made up of a number of system devices according to the present invention is formed by a wireless connection between a number of system devices SG1, SG2 and SG3 and an intermediate station ZS and a control center ZE.
  • the three system devices comprise two lamps and a sensor unit.
  • the lights can be attached to a mast, to the wall or to the ceiling, for example, or they can be provided directly on the ground, for example as a bollard or in a mast section.
  • the sensor unit can be provided in the vicinity of the lights, for example in order to record data for controlling the light, such as brightness or another environmental condition.
  • the system devices SG 1 to SG3 are coupled to an intermediate station ZS via a wireless connection. It is also possible that the system devices can communicate with each other wirelessly (in the figure 1 not shown).
  • the intermediate station ZS is coupled to a control center ZE via a wired or wireless connection.
  • Each of the system devices SG1 to SG3 has a memory in which a number of programs that control an execution unit in the system device are stored.
  • the two lights have programs A, B, C and D.
  • the sensor unit has programs E and F.
  • the execution unit of the respective system device i.e. the lamp or the sensor unit, is operated solely on the basis of the program in the system device. The operation takes place autonomously, i.e. even if there is no connection to the intermediate station ZS, the system device functions according to one of the programs in the memory.
  • the programs can, for example, control different lighting levels in the lights depending on the time.
  • the sensor can have different acquisition periods or different sensitivities in the data acquisition.
  • the wireless connection from the intermediate station to the two system devices equipped with a light makes it possible to select one of the programs A to D with which the light is operated. However, it is not possible to add additional programs or modify the existing programs via the wireless interface. Such addition or modification of programs requires wired access to the system device itself. As a result, even if the wireless connection between the transfer station and the system device is modified by unauthorized access, only the program in which the system device is currently running can be modified is operated. However, the system device cannot be switched off completely nor operated in a previously unanticipated mode of operation. This increases the security of the system, even if an attacker manages to intervene in the data connection between the intermediate station and the system device.
  • a functional status of the lamp can also be sent to the intermediate station via the wireless communication between the system devices SG1 and SG2 designed as a lamp and the intermediate station. This data can also be forwarded to the control center ZE.
  • the system device designed as a sensor unit can be operated in just two different programs E and F. Changing the programs is again only possible via the wireless connection from the intermediate station to the system device. Furthermore, the wireless connection from the system device to the intermediate station is used to transmit the measurement data from the sensor unit. This data can also be passed on from the intermediate station to the control center. In this way, for example, a decision for a program change in one of the two other device units, which include a light, can be given up. As previously described, the program change from the central unit passed on to the system devices via the intermediate station.
  • system devices were described as lights and as a sensor unit, respectively. It is to be understood that system devices can also include signaling devices, for example traffic lights, or devices for building technology, such as ventilation, sun protection devices and the like. Preferably, however, only system devices are provided for the control of which a relatively small volume of data is required, for example comparable to a ZigBee network for controlling lighting systems.
  • the network can be used in particular for the control of outdoor or indoor systems.
  • the wireless communication from the intermediate station to the system devices can extend over a distance of up to 300 m or several kilometers.
  • the system devices are connected directly to the central unit. In this case, there is no intermediate station, with the central unit communicating directly with the system devices wirelessly.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Selective Calling Equipment (AREA)

Claims (19)

  1. Appareil de système destiné à fonctionner dans un réseau constitué de plusieurs appareils de système similaires, comprenant :
    une unité d'exécution pour le fonctionnement autonome d'un dispositif d'éclairage, d'un système de bâtiment, d'un système de signalisation et/ou d'un système de capteurs, dans lequel le fonctionnement autonome a lieu selon un programme qui est enregistré dans l'appareil de système et
    une interface sans fil pour la réception d'instructions, dans laquelle les instructions provoquent un changement du programme pour un autre programme parmi une sélection de programmes,
    dans lequel la sélection de programmes est installée sur l'appareil de système, caractérisé en ce que les programmes de la sélection ne sont pas modifiables ou ne peuvent être modifiés que par une interface filaire de l'appareil de système.
  2. Appareil de système selon la revendication 1, dans lequel l'interface sans fil est conçue pour recevoir des instructions uniquement dans une fenêtre de temps définie.
  3. Appareil de système selon l'une des revendications précédentes, dans lequel l'interface sans fil est en outre conçue pour l'émission, afin d'émettre sans fil des données concernant l'état de fonctionnement de l'appareil de système.
  4. Appareil de système selon l'une des revendications précédentes, dans lequel l'interface sans fil est conçue pour l'émission de données et l'appareil de système comprend en outre une unité de capteur et est conçue pour émettre les données saisies avec l'unité de capteur par l'intermédiaire de l'interface sans fil.
  5. Appareil de système selon la revendication 4, dans lequel l'unité de capteur est conçue pour déterminer un ou plusieurs de ces éléments : lumière, images, mouvements, plus particulièrement la densité de circulation ou la disponibilité des places, les vitesses de circulation des véhicules, le lieu et la direction des participants au trafic, les conditions environnementales, plus particulièrement la température, l'humidité et la pression.
  6. Appareil de système selon l'une des revendications précédentes, dans lequel l'appareil de système comprend une unité de signalisation afin d'émettre des signaux visuels, optiques ou acoustiques, dans lequel l'unité de signalisation peut afficher, plus particulièrement un état de fonctionnement d'un composant de l'appareil de système et l'état de fonctionnement peut en outre être émis par l'intermédiaire de l'interface sans fil.
  7. Appareil de système selon l'une des revendications précédentes, dans lequel l'interface sans fil communique par l'intermédiaire d'un protocole Wifi ou Bluetooth.
  8. Appareil de système selon l'une des revendications précédentes, dans lequel l'interface sans fil sans fil est conçue pour émettre une identification de l'appareil de système, plus particulièrement en lien avec un état de fonctionnement de l'appareil de système ou les données mesurées dans une unité de capteur de l'appareil de système.
  9. Appareil de système selon l'une des revendications précédentes, dans lequel la sélection des programmes comprend des périodes et/ou des types de mesure de données différentes,
    comprennent des niveaux d'éclairage différents en fonction du temps ou en fonction des données mesurées,
    comprennent différents chiffrages des données émises et/ou
    émettent différents signaux ou combinaison de signaux sur une unité d'émission, par exemple l'interface sans fil.
  10. Appareil de système selon l'une des revendications précédentes, dans lequel l'appareil de système comprend une horloge et/ou un dispositif intégré pour la détermination du lieu géographique, par exemple GPS.
  11. Appareil de système selon l'une des revendications précédentes, dans lequel l'interface sans fil est conçue pour envoyer les données à un dispositif de communication filaire et/ou à une station intermédiaire qui est reliée de manière filaire ou sans fil à un dispositif de communication central.
  12. Appareil de système selon l'une des revendications précédentes, dans lequel l'appareil de système est conçu pour arrêter l'interface sans fil pendant un temps prédéterminé.
  13. Appareil de système selon la revendication 12, dans lequel, lors d'une remise en marche de l'interface sans fil, le programme qui exécute l'unité d'exécution est changé.
  14. Système comprenant une station intermédiaire et au moins un appareil de système selon l'une des revendications précédentes, dans lequel la station intermédiaire comprend une interface sans fil qui est conçue pour envoyer des instructions afin de changer le programme qui exécuté l'appareil de système pour un autre programme, enregistré dans l'appareil de système.
  15. Système selon la revendication 14, dans lequel l'interface sans fil de la station intermédiaire est en outre conçue pour transmettre un ordre de mise en marche à un appareil de système, dans lequel l'ordre de mise en marche provoque plus particulièrement également un changement de programme dans l'appareil de système.
  16. Système selon la revendication 14 ou 15, dans lequel la station intermédiaire comprend en outre une interface filaire avec une centrale, qui est conçue pour transmettre les données concernant l'appareil de système.
  17. Système selon la revendication 16, dans lequel le trafic de données entre la station intermédiaire et la centrale est sécurisé avec un procédé cryptographique, plus particulièrement un algorithme de chiffrage symétrique ou asymétrique.
  18. Système selon la revendication 16 ou 17, dans lequel les données contiennent en outre une identification unique de la station intermédiaire.
  19. Système selon l'une des revendications 14 à 18, dans lequel la station intermédiaire est conçue pour détecter, par l'intermédiaire de l'interface sans fil, un défaut de l'appareil de système ou un autre état de fonctionnement de l'appareil de système et/ou pour le transmettre à une centrale.
EP19157911.9A 2018-02-20 2019-02-19 Appareil de système destiné à fonctionner dans un réseau sans fil Active EP3528226B1 (fr)

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Application Number Priority Date Filing Date Title
DE102018103717.1A DE102018103717A1 (de) 2018-02-20 2018-02-20 Systemgerät zum Betrieb in einem drahtlosen Netzwerk

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EP3528226A1 EP3528226A1 (fr) 2019-08-21
EP3528226B1 true EP3528226B1 (fr) 2022-08-17

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CN112446915B (zh) * 2019-08-28 2024-03-29 北京初速度科技有限公司 一种基于图像组的建图方法及装置

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DE102018103717A1 (de) 2019-08-22

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